Greg points to Google VP Marissa Mayer’s guest column at Business Week. In it, she discusses what drives innovation at Google, including just how fast things are developed.
In the case of the Toolbar Beta, several of the key features (custom buttons, shared bookmarks) were prototyped in less than a week. In fact, during the brainstorming phase, we tried out about five times as many key features — many of which we discarded after a week of prototyping. Since only 1 in every 5 to 10 ideas work out, the strategy of constraining how quickly ideas must be proven allows us try out more ideas faster, increasing our odds of success.